Auto suction hybrid pump

ABSTRACT

The invention relates to a hybrid pump ( 1 ) with a housing ( 2 ) comprising at least one suction port ( 10 ) and at least one pressure port ( 11 ). A rotor ( 5 ) is eccentrically arranged in the housing chamber ( 3 ) which is substantially enclosed in a circular manner. The rotor ( 5 ) has a plurality of circumferentially spaced vanes ( 6 ) which are radially arranged at least in some segments and are made of a material that is resiliently deformable under centrifugal force. The eccentricity ( 14 ) of the rotor ( 5 ) in relation to the housing chamber ( 3 ) and the elasticity of the rotor vane ( 6 ) are such that in a first phase of low rotational speed, the radially distant end areas ( 7 ) of each vane ( 6 ) touch only some or no circumferential segments ( 4 ) of the housing chamber ( 3 ) in the course of one rotor ( 5 ) rotation, whereas in a second phase of higher rotational speed, the radially distant end areas ( 7 ) of all vanes ( 6 ) touch the inner wall ( 4 ) of the housing chamber ( 3 ) essentially during the entire rotor ( 5 ) rotation.

The invention relates to a hybrid pump pursuant to the preamble of claim1.

In the design of pumps for transporting fluids, particularly liquids,the problem is that while a high degree of effectiveness and a lowoperating noise of the pump can be achieved with known rotary pumps,these pumps are not self-priming, in other words they cannot draw in acolumn of liquid from the stopped state, by themselves, if the rotarypump contains air. This is particularly disadvantageous if such pumpshave only short operating times and the transported column of liquidruns out of the interior of the pump again, when the pump is stopped,due to a height difference. Therefore rotary pumps often have additionalunits with which the column of liquid can be transported into thehousing chamber, before the actual operation of the rotary pump begins,and the rotary pump therefore does not run dry, but rather the housingchamber is filled with liquid, right from the start.

Other pump designs such as impeller pumps of a known design areself-priming, but they have only a low degree of effectiveness, sincethe internal friction of the pump must be overcome, for example.

Another design of pumps is represented by vane pumps, in which vanesthat are arranged to stand radially away from a rotor separate partialvolumes of the housing chamber, and liquid is transported in these,during rotation of the rotor, in each instance. The main disadvantagehere is that the vanes of the vane pumps must be fitted very accurately,since they are arranged to move relative to the rotor, and that greatwear of the pump occurs due to the friction between the vanes and theinner wall of the housing. The positive aspect is that vane pumps areself-priming even when they contain air.

DE 195 45 045 A1 shows such a vane pump, which has been developedfurther; here, the vanes of the vane pump are attached to a rotor andare configured to be elastic, so that the vanes of the rotor, which arecurved to promote flow, move along the inner surface of the housingchamber during the entire rotation movement, and rest against it undervariable bias. In this way, the vanes of the rotor separate individualvolumes within the housing chamber from one another, whereby acorresponding transport of a fluid and a pressure build-up are possible,in a manner fundamentally known for vane pumps, because of theeccentricity between the rotor and the housing chamber. The flexibilityof the vanes of the rotor, which are shaped to promote flow, has theadvantage, in this connection, that only slight wear occurs between theinner wall of the housing and the vanes of the rotor, since the vanesadapt to the different distances from the inner wall of the housingunder elastic bias, and rest against the inner wall of the housing.However, the degree of effectiveness of this pump is also notparticularly high, because of the design, and also, wear issignificantly greater as compared with rotary pumps.

It is therefore the task of the present invention to develop a pump thatis self-priming on the one hand, and, at the same time, can work at highdegrees of effectiveness, and furthermore is inexpensive to manufacture.

The solution of the task according to the invention is evident from thecharacterizing features of claim 1, in interaction with thecharacteristics of the preamble. Other advantageous embodiments of theinvention are evident from the dependent claims.

The invention proceeds from a pump having a housing, into which at leastone suction connection and one pressure connection open, and in thehousing chamber of which a rotor is arranged eccentrically; the housingchamber is enclosed essentially in circular manner, and the rotor has anumber of rotor vanes on its circumference, which are spaced apart, andradially arranged at least in some sections, and made of a material thatis resiliently, elastically deformable under the influence ofcentrifugal force. Such a pump is developed further in that theeccentricity of the rotor relative to the housing chamber, as well asthe elasticity of the rotor vanes are selected in such a manner that ina first range of low rotational speed, each rotor vane does not restagainst circumference segments of the housing chamber with its radiallydistant end region, or rests against them only part of the time, duringa revolution of the rotor, whereas in a second range of greaterrotational speed, all of the rotor vanes rest against the inner wall ofthe housing chamber with their radially distant end regions, under theinfluence of centrifugal force, essentially during the entire revolutionof the rotor. In this way, it is possible to operate the hybrid pump insuch a manner, in the first range of its speed of rotation, that itworks predominantly as a pure flow pump, essentially corresponding to arotary pump. After a threshold value for the speed of rotation has beenexceeded, however, the hybrid pump changes its operating behavior, inthat the rotor vanes deform elastically, under the influence ofcentrifugal force, to such an extent that they rest against the innerwall of the housing chamber with their radially distant end regions,essentially during the entire revolution of the rotor, and therebyseparate partial volumes of the housing chamber from one another, inliquid-sealed manner. This makes it possible to guarantee self-primingof a column of liquid, using the hybrid pump that is essentially workinglike a conventional vane pump, even if the hybrid pump was previously nthe air-filled state, because it was shut down, for example. If thehybrid pump has run empty because of being shut down, a drive motor willaccelerate the hybrid pump, which works without containing liquid, toits maximum speed of rotation, very quickly, so that the hybrid pump isoperated in the second range of a higher speed of rotation practicallyimmediately, and works as a vane pump in this operating state, so tospeak, in self-priming manner, and transports liquid into the housingchamber. Once the pump has then been filled with liquid as a result, thespeed of rotation of the drive motor will drop, because of thecounter-acting torques and the influence of the liquid, to such anextent that the operating state of the hybrid pump changes over to thefirst range of a low speed of rotation, in which the hybrid pump worksessentially like a rotary pump, and transports the liquid at a highdegree of effectiveness. This transition between the two operatingstates therefore ensures operation of the hybrid pump even in case ofdisturbances that can occur when the column of liquid tears off, as canhappen in pure rotary pumps. In this case, the hybrid pump automaticallyswitches over to higher speeds of rotation, after air has entered thepump, and this restores the self-priming operating state correspondingto a vane pump, with which the liquid can be drawn in again and, afterthe hybrid pump has been filled again, the decrease in speed of rotationoccurs once again.

The hybrid pump according to the invention therefore offers twoessential functions of pumps, namely self-priming and operation at highdegrees of effectiveness, in a single pump design. As a result, thehybrid pump according to the invention is particularly suited for areasof use in which frequently only short-term operation at full transportcapacity is demanded, while, at the same time, it cannot be avoided thatthe column of liquid drops out of the pump, due to frequent shut-downs.In the case of known pump designs, complicated designs having kick-backvalves or the like must otherwise be provided, in order to hold thecolumn of liquid in the pump; these are expensive and prone to failure,and furthermore also have a negative influence un the degree ofeffectiveness of the pump, since the suction line can no longer bedesigned to be as continuously open, because of these installations.Such measures can otherwise not be avoided, for example for pumps forfilling containers as needed, for example with which fuel in relativelysmall amounts is drawn from a storage container, for filling it intovehicles. Of course, a great variety of such uses of the hybrid pumpaccording to the invention is possible.

An advantageous embodiment provides that the elastic deformability ofthe rotor vanes is selected in such a manner that starting from acertain speed of rotation of the rotor, the deformation of the rotorvanes as a result of the centrifugal force balances out theeccentricity, so that essentially all the ends of the rotor vanes restagainst the inner wall of the housing chamber and form compressionspaces that are separate from one another. In this connection, thetransport behavior that results from the eccentricity of the hybrid pumpcan be adjusted as a function of the elasticity of the rotor vanes, insuch a manner that starting from a limit speed of rotation, the rotorvanes rest not only against parts of the circumference surface of thehousing chamber, but rather are in contact with it during the entirerevolution, and thereby separate the partial volumes of the housingchamber from one another, as this is fundamentally known forconventional vane pumps. Thus, during operation of the hybrid pump as apure flow pump, corresponding to a rotary pump, below the limit speed ofrotation, there is no wear, or wear is only very slight, because of theabsence of friction between the rotor vanes and the inner wall of thehousing, to a great extent, and the rotor vanes rest against the innerwall of the housing only for filling the housing chamber with liquid, bymeans of self-priming, during operation corresponding to a vane pump. Inthis way, the wear of the rotor vanes during operation is minimized.Additionally, the hybrid pump can also transport media that arecontaminated with particles, since the deformability of the rotor vanespermits corresponding deformations during the passage even of largerparticles, which would cause rigid rotor vanes to break.

It is advantageous if each rotor vane has a curved cross-sectionalshape, which promotes flow, whereby each rotor vane touches at least onepoint of the inner wall of the housing chamber, under elastic bias, evenat a slow speed of rotation of the rotor. In this way, the interior ofthe hybrid pump is divided into two separate regions and, at the sametime, because of the cross-sectional shape, both the elasticity of therotor vanes and their contact with the inner wall of the housing can beadapted to different operating conditions, under bias, within broadlimits. In this connection, it is advantageous if the rotor vanes have avane-shaped curvature and are resiliently, elastically deformable in thecircumference direction.

An improved effect with regard to the elastic deformation of the rotorvanes can be achieved if tribological forces of the fluid to betransported act on each rotor vane during operation of the hybrid pumpin the first range of a low speed of rotation, which forces deform therotor vanes in the direction towards the axis of rotation of the rotor.In this way, despite relatively elastic materials of the rotor vanes,they are prevented from already resting against the inner wall of thehousing at a relatively low speed of rotation, since the tribologicalforces of the fluid to be transported counteract the elastic deformationunder the centrifugal force due to rotation of the rotor. Therefore thelimit speed of rotation can be relatively high, so that in the operatingstate of the hybrid pump corresponding to a rotary pump, adequatetransport performance can be achieved. Furthermore, the operatingbehavior of the hybrid pump also depends on the medium beingtransported, because of the deformability of the rotor vanes. In thecase of fluids having low viscosity, a different deformation will occur,because of the difference in viscosity, at the same speed of rotation ascompared with high-viscosity fluids or, even gases, whereby thecentrifugal effects also play a role.

A possible embodiment provides that the rotor vanes are made of aplastic material, preferably of thermoplastic materials or polyurethaneor EPDM or nitrile or neoprene. Such materials offer sufficientdeformability and, at the same time, a high level of shape retention,even under long-term stress. At the same time, such materials can beinexpensively processed, for example using injection-molding methods,and thereby the rotor vanes and the entire rotor can be producedinexpensively. Also, the running behavior of the hybrid pump is very lowin noise.

This can be achieved, in a first embodiment, in that the rotor and therotor vanes are formed in one piece. Here, the rotor and the rotor vanescan be molded at the same time and in one piece, for example, in asingle processing step, using injection molding or other productionmethods. In this way, the number of parts of the pump is drasticallyreduced, thereby additionally lowering the assembly costs and increasingthe operational reliability. Also, in another embodiment, it is possiblethat the rotor vanes made of the resilient, elastic material areinserted into assigned recesses of the rotor and fixed in place there.This makes it possible for the rotor itself to be made of a differentmaterial from the rotor vanes, for example with regard to strengthproperties or other general conditions.

Furthermore, it is advantageous if essentially cylindrical thickenedregions are arranged at the ends of the rotor vanes that are radiallydistant from the rotor, which regions rest against the inner wall of thehousing chamber, forming a seal, and separate individual cells of thehybrid pump from one another, in the manner of a vane pump. Thesethickened regions, which are subject to corresponding wear due to thefriction against the inner wall of the housing, thereby extend theuseful lifetime of the rotor, because of their extensive masses relativeto the rotor vanes themselves and, at the same time, they form acorresponding mass distribution for the centrifugal forces that act onthem, and a greater contact surface of the rotor vanes on the innerwalls of the housing chamber.

It is advantageous if the eccentricity of the arrangement of the rotorlies in the range of up to 20%, preferably up to 2% of the outsidediameter of the rotor, including the rotor vanes. Such a value for theeccentricity can be easily bridged with the deformation of the rotorvanes, without endangering the strength properties of the rotor vanes.

A particularly simple structure of the hybrid pump can be implemented ifthe rotor and the housing consist of essentially disk-shaped basicshapes, which can be connected with one another to form a fluid seal. Inthis way, pre-finished components can be assembled in simplified manner,and also, the fluid seal of the individual parts relative to one anotheris simple to implement, by way of the large contact areas of theindividual disk-shaped basic shapes.

Furthermore, it is possible that the entry and/or exit of the fluid intoand out of the housing chamber takes place perpendicular to the axis ofrotation of the rotor of the hybrid pump. In this connection, the fluidessentially flows up to the circumference of the rotor vanes at atangent. In another embodiment, it is also possible that the entryand/or exit of the fluid into and out of the housing chamber takes placeparallel to the axis of rotation of the rotor of the hybrid pump.

Furthermore, it is possible that a universal motor can be used as thedrive of the hybrid pump.

A particularly preferred embodiment of the hybrid pump according to theinvention is shown in the drawing.

This shows:

FIG. 1 a first section-through a hybrid pump according to the invention,in a schematic representation, at a low speed of rotation, in theoperating state corresponding to a rotary pump,

FIG. 2 a section along the line AB through the hybrid pump according toFIG. 1,

FIG. 3 a section through a hybrid pump according to the invention,according to FIG. 1, at a higher speed of rotation, in the operatingstate corresponding to a vane pump,

FIG. 4 a variation of the hybrid pump according to the inventionaccording to FIG. 1, having an inlet inclined at a slant to the axis ofrotation of the rotor,

FIG. 5 a side view of the hybrid pump according to FIG. 4, with twopossible arrangements of the suction channel.

FIG. 1 shows a schematic representation of a section through a hybridpump 1 according to the invention, whereby the section runsapproximately in the parting plane of the housing 2 of the hybrid pump1, which housing is configured in plate shape. Here, the intake channel10 and the outlet channel 11 as well as the housing chamber 3 can beseen, in which a rotor 5 having rotor vanes 6 attached to it is mountedto rotate about an axis of rotation 8. Here, the axis of rotation 8 hasan eccentric arrangement relative to the axis of symmetry 9 of thehousing chamber 3, whereby the amount of the eccentricity is indicatedunder the item number 14. The arrangement of the axis of rotation 8 andthe axis of symmetry 9, as well as the essential structure of such ahybrid pump 1, is fundamentally known, for example from DE 195 45 045A1, and therefore does not need to be explained here other than asneeded for the present invention.

It is different as compared with the known vane pumps, however, that inthe hybrid pump 1 according to the invention, the rotor vanes 6 of therotor 5 do not rest against the inner wall 4 of the housing chamber 3,or only rest against it partially, in the state of rest of the hybridpump 1, i.e. below a limit speed of rotation. In this connection, therotor vanes 6 are formed of an elastically deformable material, whichcan deform, from the vane-like configuration according to FIG. 1, underthe effect of centrifugal force as the rotor 5 rotates along thedirection of rotation 17, in such a manner that the cylindricalthickened regions 7 at the ends of the rotor vanes 6 move radiallyoutward more and more, as the speed of rotation increases, and restagainst the inner wall 4 of the housing chamber 3 over an everincreasing circumference length during the revolution. After the limitspeed of rotation has been exceeded, the thickened regions 7 of therotor vanes 6 are then in constant contact with the inner wall 4 of thehousing chamber 3, as can be seen in greater detail in FIG. 3.

Under the influence of the centrifugal force, the rotor vanes 6figuratively stand away radially outward from the axis of rotation 8,and rest against the inner wall 4 more and more. In this connection, therotor vanes 6 also change their curved cross-sectional shape slightly,in that the rotor vanes 6 pass over into a stretched configuration inthe regions along the circumference direction of the inner wall 4 of thehousing that are further removed from the axis of rotation 8 of therotor 5. In those regions along the circumference direction of the innerwall 4 of the housing, which again are arranged closer to the axis ofrotation 8 of the rotor 5, this stretched configuration will spring backagain and return to the configuration that can be seen in this region,in FIG. 1 and FIG. 3, respectively.

The material of the rotor vanes 6 can consist, for example, ofthermoplastic materials, polyurethanes, EPDM, nitrile, or neoprene,whereby such materials have both a relatively great elasticdeformability and great strength and low friction wear under stress dueto friction-related contact.

In this connection, as can be better seen in FIG. 2, the rotor 5 withthe rotor vanes 6 arranged on it is fixed in place on a drive shaft 13,to which a drive motor, not shown, is attached by means of a flange.

The function of the hybrid pump 1 according to the invention can bedescribed as follows, in a comparison of the principles of the rotarypump and the vane pump combined in the hybrid pump 1.

A conventional rotary pump is not self-priming, so that before such arotary pump is started up, a fluid must be introduced into the rotarypump, into the suction side 10 and through the inlet 12. If the rotarypump is then put into operation, a volume flow of the fluid istransported by way of the rotor 5 and the rotor vanes 6, through thesuction side 10, in the inflow direction 15, so that the rotary pump nolonger falls dry. After having passed through the housing chamber, thisvolume stream exits from the rotary pump again, through the pressureside 11, in the outflow direction 16. At relatively low speeds ofrotation, below the limit speed of rotation, the hybrid pump accordingto the invention demonstrates essentially these properties, since therotor vanes 6 have no contact, or only contact at certain times, withthe inner wall 4 of the housing, as is the case in a rotary pump.

By means of the eccentric arrangement of the rotor 5 in the hybrid pump1 according to the invention, however, the compression spaces 18 form athigher speeds of rotation, as can be better seen in FIG. 3, because ofthe deformation of the rotor vanes 6, whereby the smallest volume ispresent in the compression space V1, and the volumes of the compressionspaces V2, V3, and V4 each become larger, until starting with thecompression space V5 until the compression space V8, the volumedecreases again. In this way, a structure and an operating state likethat of a vane pump results from the change in shape of the rotor vanes6, due to the effect of centrifugal force, as does an operating state ofthe hybrid pump like that of a vane pump, if the speed of rotation ofthe rotor 5 exceeds a limit speed of rotation, at which all of the rotorvanes 6 rest against the inner wall 4 of the housing chamber 3 over theentire circumference of a revolution. As a result, the hybrid pump 1according to the invention is self-priming in this operating state, i.e.the fluid is drawn in automatically in the inflow direction 15, withincertain limits, so that the chamber 3 of the housing 2 can automaticallyfill with fluid.

Such behavior, which is fundamentally known from conventional vanepumps, also occurs in the hybrid pump according to the invention, butonly if the speed of rotation of the rotor 5 exceeds a limit value.Previously, because of the relatively large eccentricity 14 and thestarting configuration of the rotor vanes 6 in the unstressed state, itis not guaranteed that the compression spaces 18 will be established,since the thickened regions 7 at the ends of the rotor vanes 6 do notrest against the inner wall 4 of the housing chamber 3, forming a seal,as is clearly evident in FIG. 1. Therefore, in this operating state, ofwhich FIG. 1 shows only one state that depends on the speed of rotation,transport of the fluid as it occurs in a conventional vane pump is notguaranteed. In this operating state, however, the rotor 5 and the rotorvane 6 work like a conventional flow pump, corresponding to a rotarypump.

In this state, the tribological forces of the transported fluid alsoexert an additional force on the rotor vanes 6, which presses the rotorvanes 6 back in the direction of the axis of rotation 8.

Only when the limit speed of rotation has been exceeded, at which thecentrifugal forces on the rotor vanes 6 become so great that the ends 7of the rotor vanes 6 rest against the inner wall 4 of the housingchamber 3 over the entire revolution, the self-priming operation of thehybrid pump 1, in accordance with a vane pump, will start.

This self-priming property of the hybrid pump 1 according to theinvention has the significant advantage that the use of the hybrid pump1 does not require any prior filling of the pump chamber, which wouldotherwise have to be performed either manually or by means of additionaldevices. Without the user of such a hybrid pump 1 noticing, fluid isdrawn in, in the operating state of the hybrid pump 1 in accordance witha vane pump, when the hybrid pump 1 is in the air-filled state, sincethe drive motor essentially runs empty and thereby reaches a high speedof rotation, above the limit speed of rotation, and then, after priminghas taken place, the hybrid pump 1 automatically goes over intotransport operation, in accordance with a rotary pump, which allows ahigh degree of effectiveness at low wear. This is always particularlypractical if such pumps are in operation only for short periods of timeand then are put into operation again after an extended period ofshut-down. Conventional pumps frequently run empty during this time, sothat the corresponding measures have to be taken for filling the pump,in advance. Such fields of use apply, for example, in connection withthe refilling of containers, for example in filling fuel into vehiclesfrom corresponding canisters or barrels, but also in a large variety ofother possible areas of use.

FIG. 4 shows a cross-sectional view, and FIG. 5 shows a related sideview, of a corresponding hybrid pump 1 according to the invention, inwhich the suction channel 10 does not run within the plane perpendicularto the axis of rotation of the rotor 5. In this way, it is possible toundertake the inflow of the fluid through the suction channel 10 in theinflow direction 15, either at an angle of 45 degrees, for example, asshown with the solid lines in FIG. 5, whereby of course it is alsopossible to implement an inflow direction 15′ by means of an intakechannel 10′ shown with a broken line, essentially parallel to the axisof rotation 8 of the rotor 5. This can be of interest for specificapplications, in terms of flow technology.

Reference Number List

-   1—hybrid pump-   2—housing-   3—housing chamber-   4—inner wall of housing-   5—rotor-   6—rotor vane-   7—thickened regions-   8—axis of rotation, rotor-   9—axis of symmetry, housing chamber-   10—suction channel-   11—pressure channel-   12—inlet-   13—drive shaft-   14—eccentricity-   15—inflow direction-   16—outflow direction-   17—direction of rotation, rotor-   18—compression spaces

1. Hybrid pump (1) having a housing (2), into which at least one suctionconnection (10) and one pressure connection (11) open, and in thehousing chamber (3) of which, which is enclosed essentially in circularmanner, a rotor (5) is arranged eccentrically, which has a number ofrotor vanes (6) on its circumference, which are spaced apart, andradially arranged at least in some sections, and made of a material thatis resiliently, elastically deformable, wherein the eccentricity (14) ofthe rotor (5) relative to the housing chamber (3), as well as theelasticity of the rotor vanes (6) are selected in such a manner that ina first range of low rotational speed, each rotor vane (6) does not restagainst circumference segments (4) of the housing chamber (3) with itsradially distant end region (7), or rests against them only part of thetime, during a revolution of the rotor (5) so that the hybrid pump (1)works in a not self-griming manner, whereas in a second range of greaterrotational speed, all of the rotor vanes (6) rest against the inner wall(4) of the housing chamber (3) with their radially distant end regions(7), under the influence of centrifugal force, essentially during theentire revolution of the rotor (5) so that the hybrid pump (1) works ina self-priming manner.
 2. Hybrid pump (1) according to claim 1, whereinthe elastic deformability of the rotor vanes (6) is selected in such amanner that starting from a certain speed of rotation of the rotor (5),the deformation of the rotor vanes (6) as a result of the centrifugalforce balances out the eccentricity (14), so that essentially all theends (7) of the rotor vanes (6) rest against the inner wall (4) of thehousing chamber (3) and form compression spaces (18) that are separatefrom one another, corresponding to a vane pump.
 3. Hybrid pump (1)according to claim 1, wherein each rotor vane (6) has a curvedcross-sectional shape, which promotes flow, whereby each rotor vane (6)touches at least one point of the inner wall (4) of the housing chamber(3), under elastic bias, even at a slow speed of rotation of the rotor(5).
 4. Hybrid pump (1) according to claim 1, wherein in the first rangeof a low speed of rotation, the hybrid pump (1) works exclusively orpredominantly as a flow pump, similar to a rotary pump.
 5. Hybrid pump(1) according to claim 4, wherein the operation of the hybrid pump (1)does not permit self-priming of a liquid medium in the first range of alow speed of rotation.
 6. Hybrid pump (1) according to claim 4, whereinin the operation of the hybrid pump (1) in the first range of a lowspeed of rotation, tribological forces of the fluid to be transportedact on each rotor vane (6), which deform the rotor vane (6) in thedirection towards the axis of rotation (8) of the rotor (5).
 7. Hybridpump (1) according to claim 1, wherein in the second range of the higherspeed of rotation, the hybrid pump (1) works exclusively orpredominantly as a displacement pump, similar to a vane pump.
 8. Hybridpump (1) according to claim 7, wherein the operation of the hybrid pump(1) allows a high degree of effectiveness in the first range of the lowspeed of rotation.
 9. Hybrid pump (1) according to claim 1, wherein therotor vanes (6) have a vane-shaped curvature and are resiliently,elastically deformable in the circumference direction (17).
 10. Hybridpump (1) according to claim 1, wherein the rotor vanes (6) are made of aplastic material, preferably of thermoplastic materials or polyurethaneor EPDM or nitrile or neoprene.
 11. Hybrid pump (1) according to claim1, wherein the rotor (5) and the rotor vanes (6) are formed in onepiece.
 12. Hybrid pump (1) according to claim 1, wherein the rotor vanes(6) made of resilient, elastic material are inserted into assignedrecesses of the rotor (5) and fixed in place there.
 13. Hybrid pump (1)according to claim 1, wherein essentially cylindrical thickened regions(7) are arranged at the ends of the rotor vanes (6) that are radiallydistant from the rotor (5), which regions rest against the inner wall(4) of the housing chamber (3), forming a seal, and separate individualcells (18) from one another.
 14. Hybrid pump (1) according to claim 1,wherein the eccentricity (14) of the arrangement of the rotor (5) liesin the range of up to 20%, preferably up to 2% of the diameter of therotor (5).
 15. Hybrid pump (1) according to claim 1, wherein the volumesof the compression spaces (18) vary, starting from a minimum in theregion of the suction side (10), by way of a maximum, to a minimum inthe region of the pressure side (11) of the hybrid pump (1).
 16. Hybridpump (1) according to claim 1, wherein the rotor (5) and the housing (2)consist of essentially disk-shaped basic shapes, which can be connectedwith one another to form a fluid seal.
 17. Hybrid pump (1) according toclaim 1, wherein the entry (10) and/or the exit (11) into and out of thehousing chamber (3) takes place perpendicular to the axis of rotation(8) of the rotor (5) of the hybrid pump (1).
 18. Hybrid pump (1)according to claim 17, wherein the entry (10) and/or exit (11) of thefluid into and out of the housing chamber (3) takes place parallel tothe axis of rotation (8) of the rotor (5) of the hybrid pump (1), atleast with one component.
 19. Hybrid pump (1) according to claim 1,wherein a universal motor can be used as the drive of the hybrid pump(1).